no problem artisteer is working well under Windows 7 64-bit
Like Frank said, most of software are based on 32-bit release
Windows 64-bit is cool for addressing and memory purposes.
You can manage up then 4GB of Memory
(Vista & Windows 7 32-bit are in fact limited to 3GB, when your system tells it has 4 GB, that's a fake : 3 GB are used and 1 GB is reserved for drivers and system)

i have the same problem with Artiseer4 on my Windows 7 Ultimate. After 99% from Installation, i became the message Artiseer not works anymore, because an other programm...
The software never starts, because the same message;(
Netframework de istalled and installed, during the installation the Antivirusprogramm Avira was disabled.
Sorry for my bad english, but I have no plan now;(((

64bit programs take advantage of larger quantities of RAM. 32bit programs all have to share the first 3 gigs of RAM even if you have 4, 6, 8 or 16 gigs or RAM. I have 16Gb of RAM on my Win-7 x64 system, but with all the high end 32bit programs running, I'm maxing out at around 3.84gb and that's with about a gig in virtual memory... If Artisteer were a 64 bit program it would be free to utilize the higher RAM portions, freeing up some of that lower end RAM for other 32bit programs.

hi dears.
i install the artisteer4.3.0.60745 but it does not work .
an error is apearing when i want to start it that tels :
"artisteer has stop working
windows can check online for a solution to the problem.
->check online for a solution and close the program
->close the program